FDR pushed legislation that would have effectively banned all guns, not just machineguns, through confiscatory taxes on guns and ammunition. Congress wouldn't go along with most of the bill, but did pass the machinegun tax bill as the National Firearms Act. The original bill proposed (IIRC) transfer taxes of $5000 on machinegus, $1000 on handguns, $500 on rifles, and $200 on shotguns. There was also to be a tax of $5 on a round of handgun ammo, $1 on rifle ammo (including .22) and $.50 on shotshells. As others noted, those sums would have been impossible to raise for any but the wealthy, but then most members of the "populist" administration were very wealthy.
FDR also started the practice of proposing the most draconian anti-gun legislation while pretending to be a shooter and hunter. Of course, we now know that his legs were totally paralyzed, but at that time it was kept secret and few knew it. One time, he was taken to a military rifle range, dressed in a shooting jacket, and laid down with a Springfield rifle. He turned half around, as if he had just finished a string and gave his famous smile for the photographer. Then he was picked up and driven back to the White House. He never fired a shot and may never have fired a rifle in his life, but the picture was put in the gun and hunting magazines (all two or three of them) to show that he was "one of us."
So, Kerry and Obama were merely carrying on a tradition of fakery and lies in claiming to be shooters and hunters.
Jim